div,
ul,
li,
html,
body{
    margin: 0;
    padding: 0;
}
html,
body{
    height: 100%;
}
li{
    list-style-type: none;
}
.wrap{
    height: 100%;
    overflow: hidden;
    perspective: 800px;
}
#box{
    position: relative;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    transform-style: preserve-3d;
    transform: translateZ(-1600px);
    z-index: 1;
}
#box li{
    top: -80px;
    left: -60px;
    position: absolute;
    width: 120px;
    height: 160px;
    background-color: rgba(5, 100, 80, .2);
    text-align: center;
    line-height: 160px;
    border: solid 1px rgba(125, 255, 255, .25);
    box-shadow:0 0 15px rgba(0, 255, 255, .5);
}
#box li span{
    font-size: 28px;
    font-weight: blod;
    text-shadow: 2px 2px 5px black;
    color: #efebef;
}
.mask{
    width: 100%;
    height: 100%;
    background: url(../imgs/小乔12.jpg) no-repeat ;
    background-size: cover;
    /* filter: blur(2px); */
}
.mask >.bg-mask{
    width: 100%;
    height: 100%;
    background: #000;
    opacity: .25;
}



